CN112453415B - Jet disc and atomization powder making system using same - Google Patents
Jet disc and atomization powder making system using same Download PDFInfo
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- CN112453415B CN112453415B CN202011358670.2A CN202011358670A CN112453415B CN 112453415 B CN112453415 B CN 112453415B CN 202011358670 A CN202011358670 A CN 202011358670A CN 112453415 B CN112453415 B CN 112453415B
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- air
- exhaust
- channel
- airflow
- air flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/086—Cooling after atomisation
- B22F2009/0876—Cooling after atomisation by gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
Abstract
The invention discloses an air jet disc and an atomized powder making system using the same. The air injection disc comprises a shell, an air inlet channel and an air flow channel which are communicated with each other are arranged in the shell, and air flow moves circumferentially along the guide direction of the air inlet channel and the air flow channel; the airflow channel is communicated with a plurality of exhaust channels, and each exhaust channel extends towards the direction of the central axis around which the airflow moves and towards the lower part of the shell; the horizontal projection of the exhaust channel is inclined to the radial direction of the moving direction of the airflow, and the inclined directions of the horizontal projections of the adjacent exhaust channels are the same; the exhaust channel is provided with air injection holes with downward openings, and the air injection holes are all positioned on the same horizontal plane and on the same circumferential path. The air jet disc can generate high-speed rotating airflow to break an air film on the surface of atomized liquid drops, so that the cooling speed of the liquid drops is increased. The gas atomization powder preparation system adopting the air jet disc can prepare large-particle-size spherical amorphous powder with the D100 of 120 mu m.
Description
Technical Field
The invention relates to the field of amorphous powder preparation, in particular to an air jet disc and an atomization powder preparation system using the same.
Background
At present, amorphous powder used in the industry is mainly obtained by mechanically crushing an amorphous strip, and is limited by raw materials and crushing equipment, and the amorphous powder obtained by the method is flaky powder with large particle size and irregular outline. When the amorphous powder is used for preparing an amorphous magnetic core or an amorphous magnetic powder core, an insulating layer of the amorphous powder is easy to puncture in the pressing process, and the performance of a component is influenced.
With the continuous development of electronic devices and components towards miniaturization, high frequency and large current, the industry also puts higher requirements on amorphous powder for preparing magnetic powder cores and inductors, such as sphericity, particle size distribution, oxygen content and the like, but the powder particle size of the amorphous powder prepared by the existing gas atomization method can only reach 25 μm, which is difficult to meet the increasing use requirements.
Disclosure of Invention
The invention aims to provide an air jet disk capable of accelerating the cooling speed of amorphous powder, and spherical amorphous powder with large grain diameter can be prepared by utilizing the air jet disk.
In order to achieve the purpose, the invention adopts the following technical scheme:
the jet disc comprises a shell, wherein an air inlet channel and an air flow channel which are communicated with each other are arranged in the shell, and the air flow moves circumferentially along the guide direction of the air inlet channel and the air flow channel; the airflow channel is communicated with a plurality of exhaust channels, and each exhaust channel extends towards the direction of the central axis around which the airflow moves and towards the lower part of the shell; the horizontal projection of the exhaust channel is inclined to the radial direction of the moving direction of the airflow, and the inclined directions of the horizontal projections of the adjacent exhaust channels are the same; the exhaust channel is provided with air injection holes with downward openings, and the air injection holes are all positioned on the same horizontal plane and on the same circumferential path.
The working principle of the invention is as follows:
the high-pressure high-speed airflow enters the shell from the air inlet channel and flows along the airflow channel. Under the matching influence of the air inlet channel and the air flow channel, high-pressure and high-speed airflow makes circumferential motion in the shell and flows into the air exhaust channel and is ejected out of the air injection holes. Because the horizontal projection of the exhaust channel is inclined to the radial direction of the movement direction of the airflow, and the inclined directions of the horizontal projections of the adjacent exhaust channels are the same, the high-pressure high-speed airflow ejected from the air injection hole still keeps circumferential movement, so that the high-pressure high-speed airflow can move along a single-blade hyperbolic track after leaving the air injection hole, and high-speed rotating airflow is formed. After the amorphous material melted into molten steel enters the high-speed rotating airflow, the amorphous material can be atomized into liquid drops by the high-speed rotating airflow and the air film on the surface of the liquid drops is broken by the high-speed rotating airflow, so that the liquid drops can be rapidly cooled in the high-speed rotating airflow to form amorphous powder.
In one embodiment, the air flow channel is of an annular structure, the exhaust channel is communicated to the inner circular wall of the air flow channel, and the air inlet channels are uniformly distributed on the circumference of the air flow channel and are tangentially connected with the outer circular wall of the air flow channel. The high-pressure high-speed airflow entering from the air inlet pipeline rotates at a high speed in the airflow channel and is discharged from the air outlet channel.
The invention also provides an atomization powder-making system applying the paint spraying disc, which comprises a heat-resistant container for containing molten steel and the paint spraying disc; the bottom of the heat-resistant container is provided with a flow guide pipe facing to the circumferential path of the air injection holes, the air injection disc is arranged below the flow guide pipe, and the shell of the air injection disc is provided with a liquid through hole which is arranged towards the direction of the flow guide pipe.
The molten steel flows out from the flow guide pipe at the bottom of the heat-resistant container to form a high-temperature liquid flow, and naturally falls into a circumferential path where the gas jet holes are located through the liquid through holes, so that the high-temperature liquid flow enters the inside of the high-speed rotating airflow, is influenced by the high-speed rotating airflow, is dispersed into a plurality of fine fiber bundles, and continuously splits a plurality of liquid drops wrapped by the high-speed rotating airflow from the surface of the molten steel or the fine fiber bundles. Under the influence of centrifugal force, the liquid drops move downwards under the wrapping belt of the high-speed rotating airflow and move towards the outer side of the high-speed rotating airflow. In the moving process, the liquid drops are influenced by continuous impact of high-speed rotating airflow, and an air film wrapped on the surfaces of the liquid drops is broken, so that the liquid drops are directly contacted with the high-speed rotating airflow, accelerated cooling is performed in the process of moving by the high-speed rotating airflow, and amorphous powder with a spherical outer contour is formed.
The invention has the following advantages:
1. the air jet disc can generate high-speed rotating airflow to break an air film on the surface of atomized liquid drops and accelerate the cooling speed of the liquid drops;
2. the gas atomization powder preparation system adopting the air jet disk can prepare large-particle-size spherical amorphous powder with the D100 being 120 mu m, the sphericity of the prepared amorphous powder is more than 90 percent, the oxygen content is less than 200ppm, and the tap density is more than 4.5g/cm3Can ensure D100The < 120 μm powder is amorphous.
Drawings
FIG. 1 is a schematic structural view of an air jet disk in embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a jet disk in example 1 of the present invention.
Description of reference numerals: 1-an airflow channel; 2-a first circumferential surface; 3-a second circumferential surface; 4-an intake passage; 5-air exhaust hole; 6-an exhaust channel; 7-gas injection holes; 8-a third circumferential path; 9-liquid passing through hole.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1
The air disk as shown in fig. 1-2 comprises a housing, wherein an air flow channel 1 having an annular structure is disposed in the housing, and a first circumferential surface 2 and a second circumferential surface 3 which are concentrically disposed are respectively formed on an outer circumferential wall and an inner circumferential wall of the air flow channel 1. In the center of the air flow channel 1, a liquid passing through hole 9 is arranged in the shell.
4 intake passages 4 are uniformly arranged in the circumferential direction of the airflow passage 1. The air inlet channel 4 is communicated with the air flow channel 1 and is tangentially connected with the outer circular wall of the air flow channel 1. The high-pressure high-speed airflow entering from the air inlet pipeline moves circumferentially in the airflow channel 1 and rotates around the center of the airflow channel 1 at a high speed.
The inner circular wall of the airflow channel 1 is provided with 8 exhaust holes 5, and each exhaust hole 5 is communicated with an exhaust channel 6. The exhaust passages 6 are evenly arranged around the center of the airflow passage 1, and each exhaust passage 6 extends toward the center of the airflow passage 1 and extends downward of the airflow passage 1. The exhaust passage 6 may be provided directly inside the casing, or a plurality of exhaust ducts may be provided outside the casing, with an exhaust passage being provided in each exhaust duct. The projection of the exhaust duct on the horizontal plane is inclined to the radial direction of the air flow channel 1, and the inclination directions of the projections of the adjacent exhaust channels 6 on the horizontal plane are the same, so that when the air flow is sprayed out from the exhaust channels 6, the air flow flows in the clockwise direction or the anticlockwise direction. In the present embodiment 1, the air flow is ejected from the exhaust passage 6 and then flows in the counterclockwise direction.
The end part of the exhaust channel 6 is provided with air injection holes 7, the air injection holes 7 are opened downwards, all the air injection holes 7 are positioned on the same horizontal plane and positioned on a third circumferential path 8, and the projection of the third circumferential path 8 on the horizontal plane is concentrically arranged with the projection of the first circumferential surface 2 and the second circumferential surface 3 on the horizontal plane.
As shown in fig. 1, in this embodiment 1, the gas injection holes 7 and the gas exhaust holes 5 are in one-to-one correspondence communication through the gas exhaust channels 6, and a phase angle α is formed between the gas exhaust holes 5 and the gas injection holes 7 that are in correspondence communication, where a value of α may be in a range of 0 to pi/2. In this embodiment 1, α ═ pi/4.
High-pressure and high-speed airflow enters the interior of the housing from the air inlet passage 4 and flows along the airflow passage 1. Under the matching influence of the air inlet channel 4 and the air flow channel 1, high-pressure and high-speed air flow moves circumferentially in the shell and flows into the air exhaust channel 6 and is ejected from the air injection holes 7. Through the inclined design of the exhaust pipeline and the phase angle design between the exhaust hole 5 and the air injection hole 7, the high-pressure high-speed airflow injected from the air injection hole 7 still keeps flowing in the anticlockwise direction, so that the high-pressure high-speed airflow can move along a single-blade hyperbolic track after leaving the air injection hole 7 to form high-speed rotating airflow. After the amorphous material melted into molten steel enters the high-speed rotating airflow, the amorphous material can be atomized into liquid drops by the high-speed rotating airflow and the air film on the surface of the liquid drops is broken by the high-speed rotating airflow, so that the liquid drops can be rapidly cooled in the high-speed rotating airflow to form amorphous powder.
Example 2
This example 2 provides an atomized coal pulverizing system comprising a tundish as a heat-resistant container and the jet plate of the foregoing example 1; the bottom of middle package is provided with the honeycomb duct towards fumarole circumference route, and the jet disc sets up in the below of honeycomb duct, is provided with the liquid through-hole on the jet disc, should cross the setting of liquid through-hole towards the honeycomb duct direction.
The molten steel flows out from the flow guide pipe at the bottom of the heat-resistant container to form a high-temperature liquid flow, naturally falls into a circumferential path where the gas injection holes 7 are located through the liquid through holes, enters the inside of the high-speed rotating airflow, is influenced by the high-speed rotating airflow, is dispersed into a plurality of fine fiber bundles, and continuously splits a plurality of liquid drops wrapped by the high-speed rotating airflow from the surface of the molten steel or the fine fiber bundles. Under the influence of centrifugal force, the liquid drops move downwards under the wrapping belt of the high-speed rotating airflow and move towards the outer side of the high-speed rotating airflow. In the moving process, the liquid drops are influenced by continuous impact of high-speed rotating airflow, and an air film wrapped on the surfaces of the liquid drops is broken, so that the liquid drops are directly contacted with the high-speed rotating airflow, accelerated cooling is performed in the process of moving by the high-speed rotating airflow, and amorphous powder with a spherical outer contour is formed.
The description is only a preferred embodiment of the invention, and all technical equivalents which come within the spirit and scope of the invention are intended to be protected.
Claims (6)
1. A jet-propelled dish for preparing atomizing powder process system of amorphous powder which characterized in that: the air inlet channel and the air flow channel are communicated with each other, air flow moves circumferentially along the guiding direction of the air inlet channel and the air flow channel, the air flow channel is of an annular structure, the air exhaust channel is communicated to the inner circular wall of the air flow channel, and the air inlet channel is uniformly distributed in the circumferential direction of the air flow channel and is in tangential connection with the outer circular wall of the air flow channel; the air flow channel is communicated with a plurality of exhaust channels, and each exhaust channel extends towards the direction of the central axis around which the air flow moves and towards the lower part of the shell; the horizontal projection of the exhaust channel is inclined to the radial direction of the circumferential movement direction of the airflow, and the inclined directions of the horizontal projections of the adjacent exhaust channels are the same; the exhaust channel is provided with air injection holes with downward openings, the air injection holes are positioned on the same horizontal plane and on the same circumferential path, and the horizontal projection of the circumferential path where the air injection holes are positioned and the horizontal projection of the airflow channel are concentrically arranged; the gas flow can move along a single-blade hyperbolic curve after leaving the gas injection hole.
2. The jet disk of claim 1, wherein: the exhaust passages are evenly arranged around a central axis about which the air flow moves.
3. The jet disk of claim 1, wherein: exhaust holes are formed in the positions where the exhaust channels are communicated with the airflow channels, and the exhaust holes are communicated with the air injection holes in a one-to-one correspondence mode; a phase angle alpha is formed between the exhaust hole and the corresponding communicated gas injection hole, and the numerical value of the alpha is in the range of 0-pi/2.
4. The jet disk of claim 1, wherein: the exhaust passage is disposed within the housing.
5. The jet disk of claim 1, wherein: a plurality of exhaust pipelines are arranged outside the shell, and an exhaust channel is arranged in each exhaust pipeline.
6. An atomized pulverizing system using the air jet disk of any one of claims 1 to 5, wherein: comprises a heat-resistant container for containing molten steel and an air injection disc; a flow guide pipe facing to the circumferential path of the gas injection hole is arranged at the bottom of the heat-resistant container; the air injection disc is arranged below the flow guide pipe; the air injection disc is provided with a liquid through hole which is arranged towards the direction of the flow guide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358670.2A CN112453415B (en) | 2020-11-27 | 2020-11-27 | Jet disc and atomization powder making system using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358670.2A CN112453415B (en) | 2020-11-27 | 2020-11-27 | Jet disc and atomization powder making system using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112453415A CN112453415A (en) | 2021-03-09 |
| CN112453415B true CN112453415B (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011358670.2A Active CN112453415B (en) | 2020-11-27 | 2020-11-27 | Jet disc and atomization powder making system using same |
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| CN (1) | CN112453415B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5284329A (en) * | 1991-01-25 | 1994-02-08 | Leybold Alktiengesellschaft | System for the production of powders from metals |
| CN1129404A (en) * | 1994-06-13 | 1996-08-21 | 千代田化工建设株式会社 | Gas-liquid contact gas dispersion pipe, and gas-liquid contact method and apparatus using the same |
| CN101885064A (en) * | 2010-06-30 | 2010-11-17 | 山西汾西重工有限责任公司 | Liquid metal spraying double-level atomizing nozzle device |
| CN101966588A (en) * | 2010-11-04 | 2011-02-09 | 宁波双鹿能源科技有限公司 | Six-point equilibrum atomization device |
| CN102091678A (en) * | 2010-12-21 | 2011-06-15 | 常州力马干燥工程有限公司 | Airflow atomizer |
| CN107303990A (en) * | 2016-04-22 | 2017-10-31 | 戴祖清 | A kind of powder conveying apparatus |
| CN208287515U (en) * | 2018-05-04 | 2018-12-28 | 西安科酶生物科技有限公司 | A kind of shearing liquid spray drying equipment of convection current |
| EP3689512A1 (en) * | 2019-02-04 | 2020-08-05 | Mitsubishi Hitachi Power Systems, Ltd. | Metal powder producing apparatus and gas jet device for same |
-
2020
- 2020-11-27 CN CN202011358670.2A patent/CN112453415B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5284329A (en) * | 1991-01-25 | 1994-02-08 | Leybold Alktiengesellschaft | System for the production of powders from metals |
| CN1129404A (en) * | 1994-06-13 | 1996-08-21 | 千代田化工建设株式会社 | Gas-liquid contact gas dispersion pipe, and gas-liquid contact method and apparatus using the same |
| CN101885064A (en) * | 2010-06-30 | 2010-11-17 | 山西汾西重工有限责任公司 | Liquid metal spraying double-level atomizing nozzle device |
| CN101966588A (en) * | 2010-11-04 | 2011-02-09 | 宁波双鹿能源科技有限公司 | Six-point equilibrum atomization device |
| CN102091678A (en) * | 2010-12-21 | 2011-06-15 | 常州力马干燥工程有限公司 | Airflow atomizer |
| CN107303990A (en) * | 2016-04-22 | 2017-10-31 | 戴祖清 | A kind of powder conveying apparatus |
| CN208287515U (en) * | 2018-05-04 | 2018-12-28 | 西安科酶生物科技有限公司 | A kind of shearing liquid spray drying equipment of convection current |
| EP3689512A1 (en) * | 2019-02-04 | 2020-08-05 | Mitsubishi Hitachi Power Systems, Ltd. | Metal powder producing apparatus and gas jet device for same |
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| Publication number | Publication date |
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| CN112453415A (en) | 2021-03-09 |
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Address after: No.15, Shunjing Avenue, B District, Lishui and GUI Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee after: Foshan Zhongyan Magnetoelectric Technology Co.,Ltd. Address before: No.15, Shunjing Avenue, B District, Lishui and GUI Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee before: FOSHAN ZHONGYAN AMORPHOUS TECHNOLOGY Co.,Ltd. |
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